230 BIVALVE SHELLS. 



32. CORBICULA AUSTRALIS. B.M. 



C. testa ovato-oblonga, striata, subdepressa, tenui, fragili, fusco- 

 virente, intus aurantia, striis tenuissimis, transversabbus. 



Cyrena australis, Desh. Encycl. Meth. Vers, ii. 50. no. 12 ; m 



Lamk. An. s. Vert. ed. 2. vi. 278. no. 16. 

 Wood, Ind. Test. Suppl 2. pl. 14. f. 57. 



Var. /3. Testa lutescente. 



Hab. Nova IloUandia. 



33. CoRBicuLA Nepeanensis. B.M. 

 C. testa regulariter transversim ovata, tenui, turgidula, aequilate- 



rali, epidermide nitente flavicante vestita, intus pallide am-an- 

 tia, transversim striata, striis distantibus, in latere antico pro- 

 fundioribus, lateribus sequaliter obtusis; umbonibus pai-vis, 

 obtusis, erosis ; cardine angusto, dentibus cardinalibus inaequa- 

 libus tribus, valde divergentibus, lateralibus angustissimis, 

 sequalibus, obsolete tenuissime striatis. 



Cyrena Nepeanensis, Less. Voy. de la Coq. Zool. ii. 428. pl. 13. 

 f. 14. 



Hab. Fluvius Nepean dictus Novae Hollandise. 



34. CORBICULA SEMISULCATA. 



C. testa transversa, ovato-subtrigona, insequilaterali, tumidula, 

 solidiuscula, transversim incremento irregulaiiter substriata, 

 antice regulariter sulcata ; epidermide squalide virescente ves- 

 tita, aliquando zonulis transversis nigrescentibus interrupta, 

 intus profunde violacea; cardine tridentato, dentibus fere 

 aequalibus, lateralibus validis, brevibus, postico cardine re- 

 moto ; sinu pallii postico brevi, angusto, triangulari, acuto. 



Corbicula semisalcata, Desh. Proc. Zool. Soc. 1854. 



Hab. In fluvio Victorise Novse HoUandiae. Coll. Cuming. 



h. Species Americce meridionalis. 



35. CORBICULA OBSOLETA. 



C. testa ovato-trigona, obliqua, tumidula, inffiquilaterali, solidi- 

 uscula, transversim irregulariter striato-sulcata ; epidermide oli- 

 vaceo vestita, zonulis obscurioribus interrupta, utroque latere 

 declivi, antice lata, breviori, obtusa, postice subangulata ; um- 

 bonibus prominentibus, obliquis; cardine angusto ; dentibus 

 cardinalibus tribus minimis subparallelis, dentibus lateralibus 



